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package fzf
import "sync"
// queryCache associates strings to lists of items
type queryCache map[string][]*Result
// ChunkCache associates Chunk and query string to lists of items
type ChunkCache struct {
mutex sync.Mutex
cache map[*Chunk]*queryCache
}
// NewChunkCache returns a new ChunkCache
func NewChunkCache() ChunkCache {
return ChunkCache{sync.Mutex{}, make(map[*Chunk]*queryCache)}
}
// Add adds the list to the cache
func (cc *ChunkCache) Add(chunk *Chunk, key string, list []*Result) {
if len(key) == 0 || !chunk.IsFull() || len(list) > queryCacheMax {
return
}
cc.mutex.Lock()
defer cc.mutex.Unlock()
qc, ok := cc.cache[chunk]
if !ok {
cc.cache[chunk] = &queryCache{}
qc = cc.cache[chunk]
}
(*qc)[key] = list
}
// Find is called to lookup ChunkCache
func (cc *ChunkCache) Find(chunk *Chunk, key string) ([]*Result, bool) {
if len(key) == 0 || !chunk.IsFull() {
return nil, false
}
cc.mutex.Lock()
defer cc.mutex.Unlock()
qc, ok := cc.cache[chunk]
if ok {
list, ok := (*qc)[key]
if ok {
return list, true
}
}
return nil, false
}
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